The book Elements of Analytical Geometry was written by author Albert E Church Here you can read free online of Elements of Analytical Geometry book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Elements of Analytical Geometry a good or bad book?
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For we have CO = OR = CA V% = a V2. 124. If the values * Art. (105), be substituted in equation (1) of the same article, giving to r 8, first the negative and then the positive sign, we ob- tain the two equations y 8 ^ J(2o* - x*) (1), y 8 = ^ (2ax + x*) (2), which are the equations of the ellipse and hyperbola referred to the axis and principal vertex A. See figures of Arts. (106), (107). 125. Let a?', y', and x", y", be the co-ordinates of any two points of the ellipse. These co-ordinates, wh...en substituted for x and y in equation (c), must satisfy it, Art. (23), and . Give the two equations of condition a y 4. JV 2 = a 2 i 2, ay 2 or y' = -(a 8 - *') ...... (1), y" 2 = -(a* - a 8 a 8 Dividing the first by the second, member by member, we have INDETERMINATE (iKOMETRY. 147 y-- a * x'* _ (a -f- x')(a x') whence, we deduce the proportion y' : y" 3 : : (a + x')(a x') : (a -f x")(a - x"). But a + tf = AP, a z' = PB, a + a:" = AP, Therefore a x" = PT>. N 2" 11 MP 8 : M'P 2 : : AP x PB : AP' x P'B ; that is, the squares of the ordinates of any two points of the ellipse are to each other as the rectangles of the segments into which they divide the transverse axis.
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